中国物理B ›› 1992, Vol. 1 ›› Issue (2): 123-129.doi: 10.1088/1004-423X/1/2/006

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THERMALLY ACTIVATED FLUX MOTION IN HIGH-Tc SUPERCONDUCTORS

范宏昌, 张贻瞳, 金新, 童红武, 姚希贤   

  1. Department of Physics and National Laboratory for Solid State Microstructure, Nanjing University, Nanjing 210008, China
  • 收稿日期:1991-09-05 出版日期:1992-02-20 发布日期:1992-02-20
  • 基金资助:
    Project supported by the National Center for Research and Development on Superconductivity of China.

THERMALLY ACTIVATED FLUX MOTION IN HIGH-Tc SUPERCONDUCTORS

FAN HONG-CHANG (范宏昌), ZHANG YI-TONG (张贻瞳), JIN XIN (金新), TONG HONG-WU (童红武), YAO XI-XIAN (姚希贤)   

  1. Department of Physics and National Laboratory for Solid State Microstructure, Nanjing University, Nanjing 210008, China
  • Received:1991-09-05 Online:1992-02-20 Published:1992-02-20
  • Supported by:
    Project supported by the National Center for Research and Development on Superconductivity of China.

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摘要： Using the modified Anderson-Kim theory of flux creep and the Bean model, we derive an analytical ex-pression for magnetic relaxation of high-Tc superconductors, which is applicable in the whole flux creep region. The high driving force limit of the expression gives the usual logarithmic decay law and its low driving force limit takes the exponential form. Theoretical analysis is in agreement with the existing experimental results.

Abstract: Using the modified Anderson-Kim theory of flux creep and the Bean model, we derive an analytical ex-pression for magnetic relaxation of high-Tc superconductors, which is applicable in the whole flux creep region. The high driving force limit of the expression gives the usual logarithmic decay law and its low driving force limit takes the exponential form. Theoretical analysis is in agreement with the existing experimental results.

中图分类号:  (Adsorbate structure (binding sites, geometry))

  • 68.43.Fg
82.65.+r (Surface and interface chemistry; heterogeneous catalysis at surfaces) 87.15.R- (Reactions and kinetics) 87.15.A- (Theory, modeling, and computer simulation)